Apex domains cannot have CNAME records.
Question and response
Question
dig eysu.org. NS
Answer
eysu.org. 5 NS ns2.eysu.org.
eysu.org. 5 NS ns1.eysu.org.
Authority
The response has no authority records.
Additional
ns1.eysu.org. 5 A 57.129.133.54
ns2.eysu.org. 5 A 54.38.209.171
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0